Airworthiness Directive · Amendment 39-17771 · Airbus Helicopters (Type Certificate Previously Held by Eurocopter France) (Airbus Helicopters)
Airbus Helicopters (Type Certificate Previously Held by Eurocopter France) (Airbus Helicopters)
This AD applies to Model EC225LP helicopters, certificated in any category, except helicopters with the following modifications (MOD) installed:
(1) MOD 0726582, MOD 0726477, and MOD 0726583;
(2) MOD 0726592; or
(3) MOD 0726632.
We are adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model EC225LP helicopters. This AD adds a new operating limitation that requires increasing the minimum density altitude flight limitation for helicopters without certain Eurocopter modifications installed. This AD is prompted by a report that flights below a certain density altitude create oscillations in the main rotor which can transfer dynamic loads to the structure, the main gearbox (MGB), and the main servo-control inputs, which could result in subsequent loss of control of the helicopter.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Within 50 hours time-in-service, revise the Operating Limitations section of the Eurocopter EC225LP Rotorcraft Flight Manual (RFM) by inserting a copy of this AD into Section 2.3 of the RFM, or by making pen and ink changes as follows. Under paragraph 1, Altitude Limits, add the phrase:
The minimum altitude is limited to −2,000 feet density altitude.
